Heads Together commissioned a YouGov poll which found nearly half (46 per cent) of 5,003 adults, questioned in February, have talked recently about mental health, with a quarter chatting about their own psychological problems.

After praising the pop singer for speaking out about mental health, the Duke of Cambridge then revealed why he decided to embark on the Heads Together project.

He said: “Harry, Katherine and I really felt this was such an important area that throughout all of our charitable work whether it was veterans, homelessness, addiction, most of it seemed to stem back to mental health awareness.”

They have also called for employers to look after their workers mental health.

Prince William gave a speech in August saying: "Our vision to create a society that treats mental health like physical health, as something to be nurtured, needs your help.

We cannot do this without employers – and we believe it is in your interest.

"Over the coming months, Heads Together and our partners will be building on the excellent work already being done by many in this room to identify gaps in support, enhance existing services and develop new solutions for mental health in the workplace."

Prince William is due to unveil the latest initiative from the team, Mental Health at Work.

The latest campaign is due to launch on September 11, in conjunction with Mind and Heads Together.

Kensington Palace said in a statement: "Mental Health at Work is a new online gateway that will change the way we approach workplace mental health across the UK."

The Heads Together claimed one in six British workers are affected by mental health issues, but only two per cent of people were taking action and speaking to HR about it.

The Duke of Cambridge will launch 'Mental Health at Work', a new initiative from @heads_together and @MindCharity, in Bristol on Tuesday 11th September.

Mental Health at Work is a new online gateway that will change the way that we approach workplace mental health across the UK. pic.twitter.com/VRzA0dCsPj

The website explained what the new campaign aimed to achieve, saying: “The new workplace mental health initiative that we are developing with Mind includes a ‘Mental Health at Work’ website and online training that will aim to equip employees and managers with tools, training and a good understanding of mental wellbeing in order to create a healthy and supportive working environment.

“This website will bring together curated online resources enabling employers to access workplace mental health and online training, including specific training for Small and Medium sized Enterprises (SMEs), for whom it is often more difficult to provide employee mental health support.”

How else have Prince Harry and Prince William spoken out about mental health issues?

Freddie Flintoff (left) and Stephen Manderson who are among the stars talking about their mental health battles

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